* Extended set_config()
 * Implemented get_config() which takes over $CFG loading in setup.php
 * admin/auth.php has special handling if post vars starting in pluginconfig_
 * admin/auth.php print_auth_lock_options() prints a form fragment -- being called from most plugins now
 *  user/edit.php follows the new convention when locking down fields, both javascript UI and on POST.
 * admin/auth: More solid checking for auth GET/POST var.
 * admin/auth: print_auth_lock_options() now handles user field mapping options for LDAP and similar modules
 * admin/auth: user mapping options have moved to config_plugins table
 * auth/ldap module has migrated to using new field mapping vars -- simplified config.html a lot
 * auth settings migration to config_plugins